CVE-2021-20196
CVSS V2 Low 2.1
CVSS V3 Medium 6.5
Description
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
Overview
- CVE ID
- CVE-2021-20196
- Assigner
- secalert@redhat.com
- Vulnerability Status
- Modified
- Published Version
- 2021-05-26T22:15:07
- Last Modified Date
- 2023-02-12T22:15:16
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:qemu:qemu:5.2.0:-:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 1 | OR | ||
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:L/AC:L/Au:N/C:N/I:N/A:P
- Access Vector
- LOCAL
- Access Compatibility
- LOW
- Authentication
- NONE
- Confidentiality Impact
- NONE
- Integrity Impact
- NONE
- Availability Impact
- PARTIAL
- Base Score
- 2.1
- Severity
- LOW
- Exploitability Score
- 3.9
- Impact Score
- 2.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
- Attack Vector
- LOCAL
- Attack Compatibility
- LOW
- Privileges Required
- LOW
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality Impact
- NONE
- Availability Impact
- HIGH
- Base Score
- 6.5
- Base Severity
- MEDIUM
- Exploitability Score
- 2
- Impact Score
- 4
References
| Reference URL | Reference Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2022:0325 | |
| https://access.redhat.com/errata/RHSA-2022:0397 | |
| https://access.redhat.com/errata/RHSA-2022:1759 | |
| https://access.redhat.com/security/cve/CVE-2021-20196 | |
| https://bugs.launchpad.net/qemu/+bug/1912780 | Exploit Patch Third Party Advisory |
| https://bugzilla.redhat.com/show_bug.cgi?id=1919210 | |
| https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html | Mailing List Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html | Mailing List Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20210708-0004/ | Third Party Advisory |
| https://www.openwall.com/lists/oss-security/2021/01/28/1 | Mailing List Patch Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-20196 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-20196 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:26:24 | Added to TrackCVE | |||
| 2022-12-05 03:05:26 | 2021-05-26T22:15Z | 2021-05-26T22:15:07 | CVE Published Date | updated |
| 2022-12-05 03:05:26 | 2022-09-30T15:11:41 | CVE Modified Date | updated | |
| 2022-12-05 03:05:26 | Analyzed | Vulnerability Status | updated | |
| 2022-12-05 03:05:31 | References | updated | ||
| 2023-02-02 23:11:59 | 2023-02-02T21:20:49 | CVE Modified Date | updated | |
| 2023-02-02 23:11:59 | Analyzed | Modified | Vulnerability Status | updated |
| 2023-02-02 23:12:00 | References | updated | ||
| 2023-02-12 23:11:50 | 2023-02-12T22:15:16 | CVE Modified Date | updated |